diff mbox series

[3/5] hw/mips/fuloong2e: Make use of bootloader helper

Message ID 20201207050231.2712-4-jiaxun.yang@flygoat.com (mailing list archive)
State New, archived
Headers show
Series MIPS Bootloader helper | expand

Commit Message

Jiaxun Yang Dec. 7, 2020, 5:02 a.m. UTC 
Use bootloader helper to generate kernel jump.
Also move kernel jump to 0x580 to avoid collisions with exception
vectors.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
---
 hw/mips/fuloong2e.c | 35 +++++------------------------------
 1 file changed, 5 insertions(+), 30 deletions(-)
diff mbox series

Patch

diff --git a/hw/mips/fuloong2e.c b/hw/mips/fuloong2e.c
index a9e0c2f8d3..0a4809c816 100644
--- a/hw/mips/fuloong2e.c
+++ b/hw/mips/fuloong2e.c
@@ -186,38 +186,13 @@  static void write_bootloader(CPUMIPSState *env, uint8_t *base,
     /* Small bootloader */
     p = (uint32_t *)base;
 
-    /* j 0x1fc00040 */
-    stl_p(p++, 0x0bf00010);
-    /* nop */
-    stl_p(p++, 0x00000000);
+    bl_gen_jump_to(&p, 0xbfc00580);
 
     /* Second part of the bootloader */
-    p = (uint32_t *)(base + 0x040);
-
-    /* lui a0, 0 */
-    stl_p(p++, 0x3c040000);
-    /* ori a0, a0, 2 */
-    stl_p(p++, 0x34840002);
-    /* lui a1, high(ENVP_ADDR) */
-    stl_p(p++, 0x3c050000 | ((ENVP_ADDR >> 16) & 0xffff));
-    /* ori a1, a0, low(ENVP_ADDR) */
-    stl_p(p++, 0x34a50000 | (ENVP_ADDR & 0xffff));
-    /* lui a2, high(ENVP_ADDR + 8) */
-    stl_p(p++, 0x3c060000 | (((ENVP_ADDR + 8) >> 16) & 0xffff));
-    /* ori a2, a2, low(ENVP_ADDR + 8) */
-    stl_p(p++, 0x34c60000 | ((ENVP_ADDR + 8) & 0xffff));
-    /* lui a3, high(env->ram_size) */
-    stl_p(p++, 0x3c070000 | (loaderparams.ram_size >> 16));
-    /* ori a3, a3, low(env->ram_size) */
-    stl_p(p++, 0x34e70000 | (loaderparams.ram_size & 0xffff));
-    /* lui ra, high(kernel_addr) */
-    stl_p(p++, 0x3c1f0000 | ((kernel_addr >> 16) & 0xffff));
-    /* ori ra, ra, low(kernel_addr) */
-    stl_p(p++, 0x37ff0000 | (kernel_addr & 0xffff));
-    /* jr ra */
-    stl_p(p++, 0x03e00008);
-    /* nop */
-    stl_p(p++, 0x00000000);
+    p = (uint32_t *)(base + 0x580);
+
+    bl_gen_jump_kernel(&p, ENVP_ADDR - 64, 2, ENVP_ADDR, ENVP_ADDR + 8,
+                        loaderparams.ram_size, kernel_addr);
 }
 
 static void main_cpu_reset(void *opaque)